publishing work anonymously

Is there a robust way to publish work anonymously? IE, publish the work and never worry about being forced to reveal yourself as the author due to some possible dispute?

Using a very unrestrictive license like MIT or WTFPL with a pseudonym seems to be good. Even if someone else claims to be the person behind the pseudonym, that person couldn't restrict your use of the software, due to the loose license. So there wouldn't even be a need dispute their claim. Or maybe I'm missing something here. Anyways, advice would be appreciated.

Take your code, license it with the MIT license, sign the entire source file with a 4096-bit key. Note in the license that only someone who has the key and can prove it by signing another file with it can make claims about its copyright.

There you go.